Well, I certainly can't be sure what site Guest, Guest is talking about, but one place I'm aware of comments being made about a person's payment practices is in eBay Feedback. I also know that eBay 'says' feedback cannot be retracted, i.e., once it's made it's there for posterity. But, if a comment was made there, a counter comment is allowed and, if an agreement or accommodation has been reached, the member who made the original comment can add a new comment to that effect.

Having read a lot of eBay feedback I'm aware that many people 'jump the gun' in leaving negative feedback, but I'm not too sure how much credence is given to it, especially if there's only one instance. And I sincerely doubt that it's not within eBay's ability to delete feedback if the member who left that feedback agrees.

But then I may be completely off base in thinking it might be an auction site.